Permit specif IPs to pools, all others see simple maintenance page REPOST as requested

What you are doing in your current iRule would not be considered a "redirect", but URI switching. The following iRule would match an IP address against the data group "data_group_name", and if it matches it will go through the rest of your logic. If it does not match an IP in the data group "data_group_name", it will redirect to http://maintenance.domain.com If you are looking to perform a pool selection based on the IP address rather than redirect, you can change the else action.

when HTTP_REQUEST {
  if { [class match [IP::client_addr] equals data_group_name] } {
    switch -glob [string tolower [HTTP::uri]] { 
      "/jumper" { 
        pool jumper_JMPRIIS_Https_Pool
        log local0. "redirect irule pool jumper_JMPRIIS_Https_Pool"
      } 
      "/" -
      "/annie" -
      "/bugg" -
      "/charles" -
      "/dog" -
      "/fashion" {
        pool fashion_FHSIIS_Https_Pool
        log local0. "redirect irule pool fashion_FHSIIS_Https_Pool"
      }
      default {
        pool skijump_SKJWEB_Https_Pool
        log local0. "redirect irule pool skijump_SKJWEB_Https_Pool"
      }
    }
  else {
    HTTP::redirect "http://maintenance.domain.com"
  }
  }
}

Eric